セオリー Common word LinksSentence search for セオリーEdit in JMdict Noun1. theoryNoun2. standard procedure; common strategy; established tactics Jreibun 一生懸命かぶ株の勉強をしたが、セオリーどお通りにはならず、おおぞん大損をした。I worked hard studying the stock market, but things did not go in accordance with theory, and I ended up losing a lot of money. Discussions Log in to talk about this word.